There was no response from the Proxy peer to an OPTIONS request sent by the Mediation Server service. The Proxy peer, %1, ...

There was no response from the Proxy peer to an OPTIONS request sent by the Mediation Server service.

The Proxy peer, %1, is not responding to an OPTIONS request sent by the Mediation Server service
Cause: The Mediation Server service cannot communicate with the Proxy peer Service over SIP due to network connectivity issues.
Resolution:
Please ensure network connectivity and availability of the Proxy Peer for the Mediation Server Service to be able to function correctly.